Specifications

DFP4 2011 Operation Manual
10
2.5. Cooling System
NOTE: Please follow all the maintenance and service procedures outlined in section 6.1
for your engine’s lubrication system.
Engine coolant (i.e. water, Ethylene Glycol, inhibitors etc.) are NOT required
for this engine.
The DFP4-2011 series engines are oil cooled and do NOT require typical water/Glycol
based coolant of any kind. The crankcase lubricating oil is used as the engine coolant.
The oil is cooled by the shell and tube style heat exchanger. As the oil passes through the
shell side it’s cooled by the raw water that is flowing through the tube side. As the oil
exits the heat exchanger it is circulated back through the engine and the process repeats.
The heat exchanger is connected to the engine using hydraulic style hoses. It does not
have any openings nor is an expansion tank required. The oil is drained and filled via the
crankcase. It is not required to drain/change the oil in the heat exchanger during an oil
change. For more information please refer to section 6.1, Lubrication System.
2.5.1. Oil Pan Heater
NOTE: The installation contractor is responsible for connecting the oil pan heater to the
pump AC outlet.
DO NOT drain the oil from the oil pan until the oil pan heater is
disconnected.
DO NOT connect the oil pan heater until the engine is properly filled with oil.
The Deutz DFP4-2011 engines are equipped with an oil pan heater that keeps the oil
warm, which assists with engine cranking. It also helps the engine achieve its maximum
rated horsepower faster.